Illuminating device

SUBSTANCE: device comprises light source and light scattering screen made of a colored plastic. The light source is composed of one or several light-emitting diodes. The screen transmits at least 35% and reflects 15% when the wavelength of radiation emitted by the diode reaches a maximum.

EFFECT: reduced sizes and power consumption.

17 cl, 2 dwg

The present invention relates to illuminated device, consisting mainly of a light source, having in its composition one or more light emitting diodes (LEDs) and paired with a light source a light-diffusing screen made of painted plastic.

The level of technology

Illuminated device, such as advertising panels, consisting mainly of a light source and associated with the light source a light-diffusing screen made of painted plastic, in principle (A2) are known (see, for example, JP 61159440). Typically, the light source used incandescent lamp or a fluorescent lamp, having a good effect of light and emitting light of a wide spectrum. Due to the wide range of light corresponding colored plastic screens in a dark state, i.e. for example, in daylight, are perceived as having the same color that can be perceived and when illuminated from behind using these light sources.

The LEDs are in comparison with such light sources like incandescent lamps or fluorescent lamps significantly smaller force of light. However, despite this colored LEDs are very well perceived in the dark, as they emit nearly monochromatic light, which in turn is relatively intensive in particular in which Arvale wavelengths.
Matching colored LEDs produced by several manufacturers, for example, LEDs come in red, green, blue and yellow. Painting and staining methods for plastics, such as polymethylmethacrylate, are known, for example, from EP-A 130576.

The task and its solution

The objective of the invention is to offer an alternative to the famous illuminated devices have painted screens of translucent plastic with incandescent or fluorescent lamps. In particular, the device must provide optical approximately the same perceived color when the light of the incident light, i.e, for example, in daylight, and when x-raying. The device must provide its implementation in less mounting depth than hitherto known devices, and to vary less power consumption.

This problem is solved by using the illuminated device, which consists mainly of a light source and one of the paired light source is a light-diffusing screen made of colored plastic and differs in that the light source consists of one or more light emitting diodes (LED), emitting colored, mostly monochromatic light, and mated with him a light-diffusing screen has a wavelength Rel the relative energy of the maximum light-emitting diode transmission (DIN 5036),
at least 35% and a reflection (DIN 5036)at least 15%.

The invention is based on the fact that transmission and diffuse reflection from the light-diffusing screen made of plastic agreed with monochromatic light used led in such a way that both reflected light and transmitted light can be obtained almost the same perceived color. Appropriate promotional or informational panels appear both during the day and educated in the state optically almost identical.

Such alignment allows you to apply for the above mentioned purpose LEDs that emit colored, respectively monochromatic light. Proposed according to the invention illuminated devices require less mounting depth, because the size of the LEDs is less than the corresponding incandescent lamps or fluorescent lamps. Also easier can be implemented in devices of complex shape. The power consumption is less for almost the same perceived color in margined condition. Since LEDs can operate at low voltage, and electrical devices offer above or, respectively, it can easily be ensured. Maintenance costs are also lower, since LEDs typically have to change less often.

Below the invention is explained more on PR which measures its performance with reference to the accompanying drawing,
however, it is not limited to the given examples.

LED = curve relative energy green led with a relative maximum energy at a wavelength of about 520 nm.

Figure 2 - image of the color chart standard colorimetric system of CIE (International Commission on illumination) with the example of the approval or determination of suitable loci (chromaticity coordinates) transmission and diffuse reflection from the plastic screens suitable for a specific color light emitting diode. Suitable loci lie in the part of the resulting rectangle, which is located inside the color chart standard colorimetric system.

LED = the locus of the led;

U = the white point color (x/y=0,33/0,33)

A = the maximum distance of the locus (0.2 unit) from the locus of the led on the line drawn from U and LED;

In = the maximum distance of the locus (0.05 units) on both sides at right angles to the line drawn from U and LED;

T = the locus bandwidth;

R = the locus reflects the I screen.

An example of carrying out the invention

The invention relates to illuminated device, consisting mainly of a light source and associated with the light source a light-diffusing screen made of painted plastic.

The light source consists of a single led or a large number of LEDs, which emit colored, mostly monochromatic light. In some cases, simultaneously can also be used LEDs of different colors.

Led color depends on the wavelength of the relative energy maximum. This relative energy maximum can be determined, for example, spectrophotometric and plotted on a spectrum of wavelengths. You can insert the led in the photometric Orb (Orb of Ulbricht) (DIN 5036) and measure the outgoing light. The highest point of the curve (the peak of the curve) is characterized by the wavelength of the relative energy maximum.

The number of LEDs depends on the dimensions of the device from the power of light used led and from the desired total brightness of the device educated in the state. The LEDs are available, for example, in the form of modules 4 LEDs in one unit and in some cases the device can be mounted very large number of LEDs.

The red led has a relative energy maximum in the range from about 610 to 640 nm.

Red led (Osram LM3-B-A) has, for example, the relative energy maximum at a wavelength of about 620 nm.

The blue led has a relative energy maximum in the range from about 440 to 500 nm.

Blue led (Osram LM3-B-B) has, for example, the energy maximum at a wavelength of about 460 nm.

Blue led (ESS Blau) has, for example, the energy maximum at a wavelength of about 475 nm.

The yellow led has a relative energy maximum in the range from about 570 to 610 nm.

The yellow led (Osram LM3-B-Y) is, for example, the energy maximum at a wavelength of about 590 nm.

The green led has a relative energy maximum in the range from about 500 to 540 nm.

The green led (Osram LM3-B-T) has, for example, the energy maximum at a wavelength of about 520 nm.

A light-diffusing screen made of plastic

Coupled with led light-diffusing screen made of plastic has a wavelength of the relative energy maximum transmittance (DIN 5036, see parts 1 and 3) at least 35%, preferably not less than 38%, particularly preferably not less than 41%, and reflection (DIN 5036, see parts 1 and 3, presented is s or diffuse reflection) not less than 15%,
preferably at least 20%, especially preferably at least 30%.

In particular, the transmittance of the light-diffusing screen, paired with a yellow led may be at least 50%, preferably not less than 60%. The corresponding reflection can be at least 25%, preferably at least 30%.

In particular, the transmittance of the light-diffusing screen, paired with red led, can be at least 40%, preferably not less than 45%. The corresponding reflection may be not less than 22%, preferably not less than 45%.

In particular, the transmittance of the light-diffusing screen, paired with a green led may be at least 40%, preferably at least 42%. The corresponding reflection may be not less than 18%, preferably not less than 20%.

In particular, the transmittance of the light-diffusing screen, paired with a blue led may be at least 40%, preferably at least 42%. The corresponding reflection can be at least 20%, preferably not less than 22%.

For the case of simultaneous use of LEDs of different colors with the purpose of obtaining a mixed color (for example, yellow and green LEDs create a color that is perceived as yellow-green) conjugated light-diffusing screen made of plastic should be at least at the wavelength concerning the CSOs energy maximum of one of the used LEDs
i.e. yellow or green LEDs, the above values in respect of transmission and reflection.

Conjugated light-diffusing screen made of plastic, which in unpainted condition and without light diffusing additives is transparent, thereby transmittance (DIN 5036, see parts 1 and 3/D65) at least 50%, preferably at least 70%, particularly preferably from 75 to 92%, at least 50%. With the scattering additives, but without coloring substances, the transmittance may be preferably not less than 40%, particularly preferably not less than 50%.

Preferred, especially for outdoor applications due to their high resistance to weathering, are plastic molded or extruded polymethyl methacrylate, for example plastic with a share of methyl methacrylate from 85 to 100% (mass.). In some cases they might copolymerization, or the polymer may contain up to 15% (mass.) suitable comonomers,such as,
for example, the esters of methacrylic acid (for example, ethyl methacrylate, butylmethacrylate, vexillarius, tikaexception), esters of acrylic acid (e.g. methyl acrylate, acrylate, butyl acrylate, hexidecimal, cyclohexylacetate) or styrene and derivatives of styrene, such as alpha-methylsterol or para-methylsterol.

Light diffusing ability of the screen, measured in accordance with DIN 5036, preferably may have a value of at least 0.5, particularly preferably not less than 0.6, in particular at least 0.7. The better light-diffusing ability, the smaller the distance between the led screen and the smaller mounting depth of the device can be implemented.

As the light-scattering additives can be used, for example, BaSO4, polystyrene or light diffusing pearls of structured plastic.

BaSO4or polystyrene are preferred light diffusing additives and introduced into the plastic preferably in an amount of from 1.5 to 2.5% (mass.).

Light diffusing pearls of structured plastics are injected into the plastic preferably in quantities of from 0.1 to 10% (mass.).

The requirement for high bandwidth at high dispersion of light is difficult to achieve the requirement. High light-scattering ability is achieved when is Anenii titanium dioxide.
But since this dye reflects most of the light, the transmittance is obtained only minor. It is better to use a clear scattering pigments, which have a refractive index different from the refractive index of the acrylic glass is approximately not more than 0.2. Suitable pigments are, for example, calcium carbonate, magnesium carbonate, trihydroxide aluminum, magnesium hydroxide, barium sulfate, etc.

Can also be used polymers in which the refractive index is within acceptable limits. For example, can be dissolved in Monomeric methyl methacrylate and polystyrene, which is then in the polymerization of precipitates and gives a material with good light dispersion. Can also be added and structured polymer particles, such as polymer pearls of structured polystyrene or structured copolymers of methyl methacrylate with phenyl(meth)acrylate or benzyl(meth)acrylate.

Manufacture of colored light-diffusing screen made of plastic

Light-diffusing and coloring tools can be added, respectively introduced in a known manner in the plastic or when it is received by the polymerization in the polymerized mixture, or during thermoplastic processing in the molten state, for example, by extras and or injection molding.
Along with plate form can be made any profiles such as tubes, rods, etc.

This method allows to obtain, for example, a plastic plate with a thickness of, for example, from 0.5 to 10 mm, preferably from 1 to 5 mm, which can be used as screens for illuminated devices according to the invention with rectangular boxes, frames or holders. The relevant pieces can be transferred to almost any shape and fit by cutting, milling, otbelivanie or other processing.

Device

The device can be configured so that the distance between the LEDs and the light-diffusing screen is from 3 to 12 cm, preferably from 4 to 10, see At this distance achieved a good display screen. If too small of a distance of the position of the led is visible in the form of light spots. When there is too much distance too severely reduced lightness.

The LEDs can, for example, be in the box or frame, close the light-diffusing screen. The screen may be provided with a layer of bearing information, such as film, or the screen itself can carry information, for example, it may be in the form of letters or numbers.

Coloring tool

As of coloring tools for the purposes of the invention are preferably used on the organic coloring matter,
because they have both reflected light and transmitted light high brightness and strength of light emission. To protect the acrylic glass from the effects of light and weather can be added sunscreens tools, ultraviolet absorbers, antioxidants, etc.

As of coloring tools for plastics can be considered, in particular, soluble dyes or organic pigments, and, less preferably, insoluble inorganic pigments. For example, can be named:

The invention proceeds from the consideration that, the closer the loci transmittance and diffuse reflectance of the painted screen are the locus of LEDs, the better must dovetail perceived color in the reflected light from the perceived color in transmitted light. However, it turned out Thu the approval staining with a specific locus of the led can practically be realized only approximately.
In General, deviations that lie on a straight or near straight line passing through the point of white (x/y=0,33/0.33) and the locus of the led, are more likely to be tolerant than deviations, which, although they have the same magnitude, but are farther away from the described line.

You should strive to ensure that the loci were localized as possible along the edge color graphics standard colorimetric system of the ice, as the brightness of the color in this area is higher. This is the result of the fact that the loci of the LEDs due to the monochromaticity of the light is also located on the edge or near edge color graphics standard colorimetric system of the ice. However, it should be borne in mind that actually installed (measured) loci may differ from theoretically expected loci.

In many cases, appropriate staining can not be achieved with the help of only one coloring tools. When using mixtures must be borne in mind that the individual components must not lie on the color graphite standard colorimetric system of CIE too far from each other as mixed colour tone in this case is too low brightness.

The loci transmittance and diffuse reflectance of the painted screen from plastic, related to color graphics hundred the standard colorimetric system of the ice,
should preferably lie in the field, which in relation to a line passing through the point of white (x/y=0,33/0.33) and the locus of the led, removed not more than 0.2 x/y-units, preferably not more than 0.1 x/y-units from the locus of the led in the direction of the straight line and not more than 0.05 x/y-units, preferably not more than 0.03 x/y-units at right angles on either side of a straight line (see also Figure 2).

To measure loci at the disposal of a specialist, there are commercially available measuring devices.

An illumination device yellow (respectively yellow-green) light

Used LEDs can emit, for example, yellow (respectively yellow-green) light and have a locus in the region of x/y=0,5/0,5+/-0,02.

Plastic screen can be painted with a mixture containing from 0,075 up to 0,09, preferably of 0.081 to 0,084% (mass.) pirazolonovogo yellow and from 0.002 to 0.004 percent, preferably from 0,0028 to 0,0032% (mass.) perineology orange.

It is advisable to combine this staining with the addition of BaSO4as the light diffusing means in the amount of from 1.9 to 2.1% (mass.).

Device for lighting a red light

Used LEDs can emit, for example, red light and have a locus in the region of x/y=0,67/0,33+/-0,02.

Plastic screen can be painted with the mixture,
containing from 0.13 to 0.17, preferably from 0.14 to 0.16% (mass.) pirazolonovogo yellow and from 0.01 to 0.03, preferably from 0.17 to 0.23% (mass.) antrahinonovye red.

It is advisable to combine this staining with polystyrene as the light diffusing means in the amount of from 1.9 to 2.1% (mass.).

Plastic screen can also be painted with a mixture containing from to 0.055 to 0.07, preferably from 0,061 to 0,064% (mass.) naphthol AS (2-hydroxy-3-(naphthoic acid)-Anilin) and 0.005 to 0.015, preferably from 0.008 to 0,012% (mass.) DPP-red (dieroller-red).

It is advisable to combine this color with polystyrene as the light diffusing means in the amount of from 1.9 to 2.1% (mass.).

Device for lighting a green light

Used LEDs can emit, for example, green light and have a locus in the region of x/y=0,16/0,73+/-0,02.

Plastic screen can be painted with a mixture containing from 0.01 to 0.025, preferably from 0.013 to 0.017% of (mass.) Cu-phthalocyaninato green and from 0.025 to 0.045, preferably from 0,028 up to 0.032% (mass.) pirazolonovogo yellow.

It is advisable to combine this staining with the addition of BaSO4or polystyrene as the light diffusing means in the amount of from 1.9 to 2.1% (mass.).

Device for illumination with blue light

Used led may emit,
for example, blue light and have a locus in the region of x/y=0,14/0,06+/-0,02.

Plastic screen can be painted with a mixture containing 0.005 to 0.01, preferably from 0,006 0,008% (mass.) antrahinonovye blue and from 0.05 to 0.1, preferably from 0.07 to 0.08% (mass.) ultramarine blue.

It is advisable to combine this staining with the addition of BaSO4as the light diffusing means in the amount of from 1.9 to 2.1% (mass.).

Plastic screen can also be painted antrahinonovye blue from 0,007 to 0,013, preferably from 0,009 up to 0.011% (mass.).

It is advisable to combine this staining with polystyrene as the light diffusing means in the amount of from 1.9 to 2.1% (mass.).

Application

In the device according to the invention is applied is described colored plastic elements containing light-diffusing substance in the quality of the screen, and colored LEDs as light source.

EXAMPLES

Examples of series 1: red 1 yellow 1 blue 1 green 1

In 1000 parts of methyl methacrylate dissolved

0.5 parts of tert-butylperbenzoate and

20 parts of polystyrene (for example, from BASF).

To the solution add the dyes according to table 1, was dissolved under vigorous stirring, the solution is poured into the chamber of the silicate glass, set over 3 Milli is atrophy spacer cord in a water bath,
and polymerized in a water bath at a temperature of 45°C for approximately 16 hours. The final polymerization is carried out in a thermostatted case at 115°C for approximately 4 hours.

20 parts of barium sulfate and coloring tools according to table 2, which is dispersed in 30 parts of methyl methacrylate using high-speed disperser (rotor/stator).

The mixture is intensively stirred, poured into the chamber of the silicate glass, installed through a 3-mm spacer cord in a water bath, and polymerized in a water bath at a temperature of 45°C for approximately 16 hours. The final polymerization is carried out in a thermostatted case at 115°C for approximately 4 hours.

Table 1Dyes series 1

Color

Cu-phtalocyanine green

Pyrazolinones yellow

Antrahinonovye is ini

Purinovy orange

Antrahinonovye purple

Antrahinonovye red

Red 1

----

0,1500

----

----

----

0,0200

Yellow 1

----

0,0825

----

0,003

----

----

Green 1

0,0200

0,0400

----

----

----

----

Blue 1

----

----

0,0100

----

----

----

Data: in % (mass.)

Table 2Dyes series 2

The sequence number

Naphthol AS

DPP red

Cu-phtalocyanine green

Ultramarine blue

Pyrazolinones yellow

Antrahinonovye blue

Purinovy orange

-

Red 2

0,0625

0,01

----

----

----

----

----

Yellow 2

----

----

----

----

0,0825

----

0,003

Green 2

----

----

0,015

----

0,03

----

----

Blue 2

----

----

----

0,077

----

0,007

----

Data: in % (mass.)

The results:

Inside the open top tin box with dimensions of 90 mm to 470 mm and height 100 mm, with a white lacquer finish, was placed on the bottom 32 led, for example from the company OSRAM (8 modules 4 LEDs each). (There are standard LEDs are comparable with each other hues are available from different manufacturers). Through the plug and socket included valid in accordance with the type of led operating current in the range from 320 to 400 mA at a voltage of 10 Century

This box was imposed and colorimetrically were evaluated by the above-described samples. Tested the e in reflected light (the effect of daylight) was carried out by fluorescent lighting, power 150 watts (D65 according to DIN 6173,
the quality class 1, for example, the lamp from Siemens) with a distance of approximately 60 cm from the top. While the LEDs were turned off. Test in transmitted light were conducted in a darkened room when the LEDs with the above performance. Color measurements were performed using a colorimeter. This device allows contactless measuring light sources and the color of the object. The distance from the sample to the probe was 1 PM When the specified device was measured brightness Y in CD/m2.

The results of color measurements and brightness are shown in table 3. Table 4 shows for comparison the corresponding results of the color measurements and the brightness obtained with commercially available screens polymethyl methacrylate with standard staining that have not been specifically agreed with LEDs.

Table 3The color coordinates x, y and luminance Y in CD/m2in terms of lighting led back in the dyeing according to the invention

* = The name of the product. The manufacturer of the product - firm Röhm GmbH & Co. KG, D-64293 Darmstadt, Germany

The results (table 3) show that is made in accordance with the above-described technology of coloured acrylic glass, in comparison with staining according to the prior art (table 4), allow to obtain higher brightness (lightness) when illuminated by the led in the back. When the scattering is so good that uniform illumination is achieved at a distance of only 40 mm from the led.

Table 5Measurements on reference samples according to the examples of series 1 and 2, but without coloring tools, but with the specified light-diffusing substances is involved in these quantities (polystyrene,
accordingly, the barium sulphate) show that the scattering power is more than 0.5 when the transmittance of more than 40%.

Additive

Dispersive

The transmittance

Polystyrene

0,65

56%

Barium sulphate

0,80

50,5%

For comparison: At the appropriate white colouring titanium dioxide can be obtained very highly dispersive order of 0.90. However, the transmittance in this case is only 20 to 30%. As a result, these varieties in transmitted light seems dark and usually not suitable for the purposes of the invention.

If the color coordinates according to table 3 to make the standard color chart (see, for example, DIN 5033 or the corresponding standard literature), it becomes evident that their values (and thus the color tone) are required by the invention borders near the line wavelengths are the same color tone (the line between the white point and color locus of the respective color LEDs). In the visual test is noticeably a good color match colors in reflected light and transmitted light.

On the curve of the transmission according to Fig 1 for the green led shows that the maximum transmittance and reflect who I am to paint the green 1 (series 1) fairly good agreement with the wavelength of the relative energy maximum of the led.
The transmittance values lie within these limits significantly above the required 30%, the values of reflection lie above the required 15%.

1. Illuminated device, consisting mainly of a light source consisting of one or more light emitting diodes (LEDs)that emit colored, mostly monochromatic light, and paired with the light source screen of painted plastic, characterized in that the conjugate with the light source, the light-diffusing screen is and has at a wavelength of the relative energy of the maximum light-emitting diode transmission (DIN 5036)at least 35% and a reflection (DIN 5036)at least 15%.

2. The device according to claim 1, characterized in that the light emitting diodes and a light-diffusing screen spaced from each other at a distance of from 3 to 12 see

3. The device according to claim 1, characterized in that the light-diffusing screen made of cast or extruded polymetylmetacrylate plastic.

4. The device according to claim 1, characterized in that the light diffusing ability of the plastic of the screen, measured in accordance with DIN 5036 is at least 0.5 in.

5. The device according to claim 4, characterized in that as the light diffusing means it contains BaSO4, polystyrene or light diffusing pearls of structured plastic.

6. The device according to claim 5, ex is different, however,
as the light diffusing means it contains BaSO4or polystyrene in an amount of from 1.5 to 2.5 wt.%.

7. The device according to claim 1, characterized in that the light emitting diodes are located in a box or frame, closed light-diffusing screen.

8. The device according to claim 1, characterized in that the loci transmittance and diffuse reflectance of the painted screen from plastic, related to color graphics standard colorimetric system MCOs are in the field, which in relation to a line passing through the point of white (x/y=0,33/0.33) and the locus of the led, removed not more than 0.2 x/y-units from the locus of the led in the direction of the straight line and not more than 0.05 x/y-units at right angles on both sides of the line.

9. The device according to claim 1, characterized in that the light emitting diodes emit yellow light and have a locus in the region of x/y=0,5/0,5+/-0,02.

10. The device according to claim 9, characterized in that the plastic screen painted pyrazolinones yellow in the amount of 0.075 to 0.09 wt.% and perineum orange in the amount of 0.002 to 0.004 wt.%.

11. The device according to claim 1, characterized in that the light emitting diodes emit red light and are the locus in x/y=0,67/0,33+/-0,02.

12. The device according to claim 11, characterized in that the plastic screen painted pyrazolinones yellow in the amount of from 0.13 to 0.17 wt.% and antrahinonovye red is in an amount of 0.01 to 0.03 wt.%.

13. The device according to claim 11, characterized in that the plastic screen stained with naphthol AS in amount from to 0.055 to 0.07 wt.% and DPP-red in the amount of 0.005 to 0.015 wt.%.

14. The device according to claim 1, characterized in that the light emitting diodes emit green light and have a locus in the region of x/y=0,16/0,73+/-0,02.

15. The device according to 14, characterized in that the plastic screen painted Cu-phthalocyaninate green in the amount of from 0.01 to 0.025 wt.% and pyrazolinones yellow in the amount of 0.025 to 0.045 wt.%.

16. The device according to claim 1, characterized in that the light emitting diodes emit blue light and are the locus in x/y=0,14/0,06+/-0,02.

17. The device according to item 16, characterized in that the plastic screen painted ultramarine blue in the amount of from 0.05 to 0.1 wt.% and antrahinonovye blue in the amount of 0.005 to 0.01 wt.%.

18. The device according to item 16, characterized in that the plastic screen painted antrahinonovye blue in the number 0,007 up of 0.013 wt.%.

SUBSTANCE: the searchlight with Frenel's lens with a regulated angle of aperture of coming out beam of light has preferably an elliptical reflector, a lamp and at least one Frenel's lens. The Frenel's lens has a diffuser, at that the diffuser is fulfilled of round form and is located only in the center of the Frenel's lens or the diffuser is fulfilled with changing degree of dispersion in such a way, that more powerfully dispersed fields are located in the middle of the diffuser and fields dispersed in a less degree are located along its edge. The Frenel's lens with the diffuser form a system of light displacement which changes the share of dispersed light in relation to the share of geometrically and optically projected light and thus changes correlation of light displacement as a function of installing a searchlight with Frenel's lens and also has a real point of focusing of a reflector removed from the reflector. The Frenel's lens is a flat-convex lens with chromatic corrected properties of projection. The covering of the Frenel's lens has a system of dielectric interference layers that changes the spectrum of light passing through it. An auxiliary reflector is installed between the Frenel's lens and the reflector.

EFFECT: provides high degree of effectiveness of obtaining of even coming out of light.

SUBSTANCE: searchlight comprises Fresnel lens with controlled aperture of output beam, elliptical reflector, lamp, and at least one Fresnel lens. The distance between the Fresnel lens and reflector can be changed depending on the distance between the lamp and reflector according to the controlled angle of the aperture of the searchlight beam. The Fresnel lens has circular diffusion screen mounted at the center of the lens. The Fresnel lens and the screen define a system for shifting light, which allows the fraction of the diffused light to be changed, and the Fresnel lens has real point of focusing that can be set in coincidence with the focusing point of the reflector. The reflector focusing point is located far from the reflector. The Fresnel lens represents a flat-convex collecting lens and has double lens with chromatic-corrected projection properties. The coating of the Fresnel lens has a system of dielectric interference layer that changes the spectrum of the light passing through it. The auxiliary reflector is interposed between the Fresnel lens and reflector.

The invention relates to a light-diffusing means, intended for use in traffic lights, which is projected (almost parallel) light beam on unpainted or painted (red, yellow, green) surface with elementary light diffusing elements to scatter light within the boundaries of certain specified limits

The invention relates to a light-diffusing means, intended for use in traffic lights, which is projected (almost parallel) light beam on unpainted or painted (red, yellow, green) surface with elementary light diffusing elements to scatter light within the boundaries of certain specified limits

SUBSTANCE: searchlight comprises Fresnel lens with controlled aperture of output beam, elliptical reflector, lamp, and at least one Fresnel lens. The distance between the Fresnel lens and reflector can be changed depending on the distance between the lamp and reflector according to the controlled angle of the aperture of the searchlight beam. The Fresnel lens has circular diffusion screen mounted at the center of the lens. The Fresnel lens and the screen define a system for shifting light, which allows the fraction of the diffused light to be changed, and the Fresnel lens has real point of focusing that can be set in coincidence with the focusing point of the reflector. The reflector focusing point is located far from the reflector. The Fresnel lens represents a flat-convex collecting lens and has double lens with chromatic-corrected projection properties. The coating of the Fresnel lens has a system of dielectric interference layer that changes the spectrum of the light passing through it. The auxiliary reflector is interposed between the Fresnel lens and reflector.

SUBSTANCE: the searchlight with Frenel's lens with a regulated angle of aperture of coming out beam of light has preferably an elliptical reflector, a lamp and at least one Frenel's lens. The Frenel's lens has a diffuser, at that the diffuser is fulfilled of round form and is located only in the center of the Frenel's lens or the diffuser is fulfilled with changing degree of dispersion in such a way, that more powerfully dispersed fields are located in the middle of the diffuser and fields dispersed in a less degree are located along its edge. The Frenel's lens with the diffuser form a system of light displacement which changes the share of dispersed light in relation to the share of geometrically and optically projected light and thus changes correlation of light displacement as a function of installing a searchlight with Frenel's lens and also has a real point of focusing of a reflector removed from the reflector. The Frenel's lens is a flat-convex lens with chromatic corrected properties of projection. The covering of the Frenel's lens has a system of dielectric interference layers that changes the spectrum of light passing through it. An auxiliary reflector is installed between the Frenel's lens and the reflector.

EFFECT: provides high degree of effectiveness of obtaining of even coming out of light.

SUBSTANCE: device comprises light source and light scattering screen made of a colored plastic. The light source is composed of one or several light-emitting diodes. The screen transmits at least 35% and reflects 15% when the wavelength of radiation emitted by the diode reaches a maximum.

SUBSTANCE: micro-lens array includes micro-lens array of Fresnel lenses, provided with grooves, divided on reflecting and deflecting parts. Reflecting surface is engineering so that angle of light fall onto it exceeds angle of full inner reflection, and limit angle is computed from formula , and functional dependence between input and output beams and micro-lens parameters is described by formula , where α - input angle; β - output angle; γ - angle of inclination of reflecting surface; δ - maximal falling angle of light; ε - angle of inclination of deflecting surface; n1 - air deflection coefficient; n2 - lens material deflection coefficient. Output beam is formed in such a way, that central groove forms wide-angle zone, and next grooves from center to edge form a zone from edge to center.

EFFECT: increased beam divergence angle after micro-structured optics up to 170-180° (depending on source used) with efficiency of 80-90% and with fully controlled shape of output beam.

SUBSTANCE: proposed Fresnel-lens searchlight whose light beam is radiated at adjustable aperture angle has reflector, lamp, and at least one Fresnel lens. The latter is essentially negative focal length lens and, hence, it is negative lens with virtual focal point. Searchlight is designed for superposing focal point distant from reflector onto virtual focal point of Fresnel lens. Mentioned point of reflector is superposed on virtual focal point of Fresnel lens in searchlight position forming quasi-parallel path of beam. It is concave-concave negative lens incorporating duplex lens with chromatically corrected display characteristics. Searchlight Fresnel lens has circular integrated dissipating glass disposed at center of Fresnel lens thereby forming light mixing system that varies some fraction of dissipated light relative to fraction of diametrically and optically reflected light, that is, light mixing is function of Fresnel-lens searchlight position. Searchlight ellipsoidal reflector is made of metal or transparent, preferably dielectric, material in the form of glass and/or plastic. Fresnel lens is covered with a number of dielectric interference layers which function to vary spectrum of light passed through lens. Auxiliary reflector is disposed between Fresnel lens and main reflector.

EFFECT: reduced space requirement and mass compared with prior-art searchlights of this type.

SUBSTANCE: searchlight comprises Fresnel lens, reflector, lamp, and at least one additional Fresnel lens. The additional Fresnel lens is made of a lens with negative focus distance and, hence, is a dispersing lens having virtual focus point. The distance (a) between the Fresnel lens and reflector can be changed in correlation with the distance (b) between the lamp and reflector on the basis of the aperture angle determined for the light beam. The virtual focusing point of the dispersing lens is positioned out of the unit of the Fresnel lens, and it can be in coincidence with the focusing point of the reflector that is located far from the reflector. The Fresnel lens is made of a double-concave dispersing lens and has double lens with chromatically corrected characteristics of imaginary. The searchlight has Fresnel lens with integrated diffusion round window that is positioned at the Fresnel lens center and defines the system for mixing light which changes the ratio of the scattered light to the reflected light. The distance (b) can be controlled by moving the lamp with respect to the top of the reflector. The reflector is made of metallic or transparent dielectric material, preferably glass or/and plastic, and represents an ellipsoidal reflector. The Fresnel lens is coated with the dielectric interference layers that change the light spectrum passing through them. The auxiliary reflector is interposed between the Fresnel lens and reflector.

SUBSTANCE: illumination device has at least one light source and at least one diffuser. The diffuser consists of at least one scattering polymer element in whose transparent polymer mass there are transparent scattering bodies. The diffuser covers at least one or more light sources and is made in form an external housing component of the illumination device. The scattering bodies have a narrow Gaussian multimodal distribution.

SUBSTANCE: illuminator has a housing in which there is a base in whose socket of which parabolic-shaped reflectors are screwed in. Powerful light-emitting diodes are fitted at the focus of the reflectors. The housing is closed by a transparent cover made from polycarbonate. There are light filters between the base and the cover. The light-emitting diodes are placed on the base symmetrically about the axis of the illuminator. Light-emitting diodes placed nearby have different spatial orientation based on the condition for obtaining a uniformly illuminated elliptical light spot, and the light-emitting diodes lying opposite each other have a reflection symmetric spatial orientation. There is a switch on the housing. The housing of the illuminator is joined to a suspension on which a unit for controlling brightness of the illuminator is mounted.

EFFECT: provision for a light spot which meets ISO 9680 requirements with simplification of the design and miniaturisation.

SUBSTANCE: optical device has at least a first separate part (10) in form of a solid waveguide and an additional separate part (10") for connecting with the light-emitting diode (LED) light source. The first separate optical part (10) narrows in the direction z in a Cartesian coordinate system from the x-y plane, has longitudinal length in the direction y which is less than or equal to its longitudinal length in the directions z and x, and has first and second flat outer surfaces (14), lying oppositely in the x-z plane, third and fourth outer surfaces (16, 20) essentially lying opposite in the x-y plane, and fifth and sixth oppositely lying outer surfaces (7), arched and rounded relative the y-z plane. The third outer surface (16) has a rectangular shape. The fifth and sixth outer surfaces (7) are arched such that the fourth outer surface has size in the direction x less than the size of the third outer surface. The third (16), fifth and sixth (7) outer surfaces are primary surfaces for light output, and the light source (6) is entirely placed in the optical device opposite the light output surface (3, 23).

EFFECT: emission of focused light, having a given intensity distribution curve.

SUBSTANCE: light-emitting device (10) has a light-emitting element (1) and an element (2) for controlling light emitted by the light-emitting element (1). The light flux control element (2) has (i) a light-receiving surface (2a) on which light emitted by the light-emitting element (1) falls, and (ii) a light-emitting surface (2b).

SUBSTANCE: device comprises light source and light scattering screen made of a colored plastic. The light source is composed of one or several light-emitting diodes. The screen transmits at least 35% and reflects 15% when the wavelength of radiation emitted by the diode reaches a maximum.